The patent describes a metallic object detection apparatus. The detection apparatus comprises a transmitter which radiates electromagnetic energy to a receiving means which has a substantially zero voltage induced therein when a metallic object is not magnetically coupled to the transmitter and the receiving means. When a metallic object becomes magnetically coupled to the electromagnetic field radiating from the transmitter, eddy currents are induced in the metallic structure of the metallic object which in turn induce a non zero voltage within the receiving means.

  • Supplemental Notes:
    • Supersedes PB-230 627. Government-owned invention available for licensing. Copy of patent available Commissioner of Patents, Washington, D.C. 20231. The date, October 7, 1975, is date of issue of the patent.
  • Corporate Authors:

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Mills, M K
  • Publication Date: 1975-10-7

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00136638
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-0453 332,, PATENT-3 911 389
  • Files: TRIS, USDOT
  • Created Date: Jul 13 2002 12:00AM